CN104513883A - Thermal treatment device for external connector part and manufacture method for external connector part - Google Patents
Thermal treatment device for external connector part and manufacture method for external connector part Download PDFInfo
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- CN104513883A CN104513883A CN201410521137.1A CN201410521137A CN104513883A CN 104513883 A CN104513883 A CN 104513883A CN 201410521137 A CN201410521137 A CN 201410521137A CN 104513883 A CN104513883 A CN 104513883A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to a thermal treatment device for an external connector part and a manufacture method for the external connector part. The thermal treatment device is provided with high-frequency induction wire coils (42) and cores (44a-44c). The high-frequency induction wire coils (42) can conduct high frequency currents and are capable of moving relatively in track grooves (22a-22c) along the axis direction of the external connector part (14) while heating the inner walls of the track grooves (22a-22c); the cores (44a-44c) are arranged on the front end face and the rear end face, positioned in the relative movement direction, of the high-frequency induction wire coils (42); magnetic force lines that are generated due to conduction of the high frequency currents are led onto the inner walls of the track grooves (22a-22c), the cores (44a-44c) enable magnetic force lines led to a top face (36) in the inner walls of the track grooves (22a-22c) to be more sparse than magnetic force lines led onto a driving force transmission face (34) in the inner walls of the track grooves (22a-22c).
Description
Technical field
The manufacture method of the thermal treatment unit inwall that the present invention relates to the rail groove of the lateral joint parts in homokinetic joint being formed hardened layer and the lateral joint parts with this hardened layer.
Background technology
In the power transmission of motor vehicle etc., use homokinetic joint, this homokinetic joint, between transmitter shaft, transmits rotary driving force from a transmitter shaft to another transmitter shaft.Fig. 6 illustrates the homokinetic joint 10 of tripod-type.Homokinetic joint 10 is made up of lateral joint parts 14 and inner contact parts (trivet parts) 18, these lateral joint parts 14 have the transmitter shaft not shown with (such as, the turning axle of variator) the axle portion 12 that links, these inner contact parts 18 are fixed on the leading section of another transmitter shaft 16 by location.
Lateral joint parts 14 have the cupule 20 being formed with and having bottom outlet, give prominence to be formed with axle portion 12 in an end of this cupule 20.Further, trivet parts 18 are contained sliding freely having in bottom outlet of cupule 20.
Particularly, at the inwall of cupule 20, to be formed with 3 the rail groove 22a ~ 22c mutually separated with the interval of 120 ° from the mode having the opening of bottom outlet to extend to bottom wall.On the other hand, trivet parts 18 have: circular portion 24, and it is formed with communicating pores at center; And 3 gudgeon 26a ~ 26c, it is the outstanding periphery being formed in this circular portion 24 radially.These gudgeons 26a ~ 26c in the mode consistent with the phase place of rail groove 22a ~ 22c, mutually with 120 ° separate at equal intervals.
Further, also there is such situation: circular retainer 28 is installed in each side of gudgeon 26a ~ 26c.Now, in the periphery of retainer 28, the circular roller 32 keeping this needle bearing 30 is installed in the mode of multiple needle bearing 30 sliding contact.That is, gudgeon 26a ~ 26c is rotatably provided with roller 32.
Therefore, when cupule 20 have in bottom outlet contain trivet parts 18 time, the roller 32 be arranged in each side of trivet parts 26a ~ 26c rolls and is inserted into freely in rail groove 22a ~ 22c.
In addition, the outer wall of the inwall of the communicating pores in circular portion 24 and the leading section of transmitter shaft 16 is formed with spline respectively.Transmitter shaft 16 is run through be inserted in above-mentioned communicating pores time, these splines engage each other.Thus, trivet parts 18 are located fixing relative to the leading section of transmitter shaft 16.
According to above-mentioned structure, the rotary driving force of the variator that the axle portion 12 with lateral joint parts 14 can be linked is delivered to transmitter shaft 16 via cupule 20 and trivet parts 18.Now, as shown in Figure 7, roller 32 abuts in the circumferentially mutually opposing face (motivating force transfer surface) 34,34 of cupule 20 with in the inwall of rail groove 22a ~ 22c, mainly, transmits rotary driving force thus from lateral joint parts 14 to trivet parts 18.
Further, when trivet parts 18 slide along axis direction in cupule 20, in rail groove 22a ~ 22c, roller 32 rolls on motivating force transfer surface 34,34.Further, when transmitter shaft 16 tilts relative to horizontal direction, retainer 28 grade and end face 36 sliding contact between motivating force transfer surface 34,34 sometimes.
Like this, causing the inwall abrasion etc. of rail groove 22a ~ 22c to suppress owing to contacting with roller 32 or retainer 28 etc., there will be a known and thermal treatment is implemented to the inwall of rail groove 22a ~ 22c and forms the method for hardened layer.
Such thermal treatment can use the thermal treatment unit with radio-frequency induction coil to carry out, and this radio-frequency induction coil can produce magnetic line of force by the conducting of high-frequency current.Such as, in this thermal treatment unit, while the radio-frequency induction coil relative movement that the inwall relative to rail groove 22a ~ 22c makes to be formed as along the shape of this inwall, magnetic line of force is made to act on this inwall.Thus, can heat respectively motivating force transfer surface 34,34 and end face 36 and form hardened layer, that is, can high-frequency quenching be carried out.
In addition, in above-mentioned lateral joint parts 14, from miniaturization and light-weighted viewpoint, attempt the size reducing external diameter while the size of the internal diameter maintaining cupule 20, that is, the thickness L1 of sidewall 36a near the end face 36 reducing cupule 20 as far as possible.Here, the thickness L1 of sidewall 36a refer to cupule 20 from end face 36 to periphery thickness.
Therefore, at the sidewall of rail groove 22a ~ 22c, compared with the sidewall 34a (along the part that the circumference of cupule 20 is connected with motivating force transfer surface 34) near motivating force transfer surface 34, the thickness L1 of sidewall 36a is little.
As mentioned above, due to roller when each transmitter shaft 16 slides 32 and motivating force transfer surface 34 sliding contact, thus in order to make this motivating force transfer surface 34 have sufficient weather resistance, be necessary to make case depth fully large.
Therefore, when the inwall utilizing above-mentioned thermal treatment unit to rail groove 22a ~ 22c is heat-treated, when the mode obtaining suitable case depth with the thickness contrasting sidewall 34a sets magneticstrength, the case depth of sidewall 36a becomes superfluous.In this case, there is the danger that hardening crack and melting etc. occur cupule 20.
On the other hand, when the mode obtaining suitable case depth with the thickness L1 contrasting sidewall 36a sets magneticstrength, the case depth of sidewall 34a is not enough.
Therefore, such as, in Japanese Unexamined Patent Publication 2012-180930 publication, such thermal treatment unit is proposed: only hardened layer is formed to the motivating force transfer surface 34 in the inwall of rail groove 22a ~ 22c, hardened layer is not formed to end face 36 and becomes non-quench section.Specifically, only motivating force transfer surface 34 is had an impact with magnetic line of force and the mode that end face 36 is not had an impact, the partition parts cutting off magnetic line of force are set in the part opposed with this end face 36 of radio-frequency induction coil.
As mentioned above, when trivet parts 18 slide in rail groove 22a ~ 22c, exist retainer 28 grade also with the situation of end face 36 sliding contact.Further, in the homokinetic joint not using retainer 28, gudgeon 26a ~ 26c and end face 36 sliding contact sometimes.According to above reason, in order to fully improve the weather resistance of rail groove 22a ~ 22c, being necessary not only at motivating force transfer surface 34, and also forming the hardened layer of suitable size (degree of depth) at end face 36.
But in the thermal treatment using the thermal treatment unit shown in Japanese Unexamined Patent Publication 2012-180930 publication to carry out, owing to not forming hardened layer at end face 36, the weather resistance thus fully improving rail groove 22a ~ 22c is difficult.
Summary of the invention
Main purpose of the present invention is to provide a kind of thermal treatment unit of lateral joint parts, it, by easily and efficiently forming the hardened layer of suitable size respectively at motivating force transfer surface and end face, can obtain while avoiding hardening crack and melting etc., substantially increase the lateral joint parts of the weather resistance of rail groove.
Another object of the present invention is to provide the manufacture method of above-mentioned lateral joint parts.
According to an embodiment of the present invention, provide a kind of thermal treatment unit of lateral joint parts, its inwall to rail groove forms continuous print hardened layer, described rail groove is formed multiple on the inner peripheral surface of the lateral joint parts of homokinetic joint along axis direction, and when trivet members slides is accommodated in described lateral joint parts freely, the roller rolls be installed on described trivet parts is inserted in described rail groove freely, it is characterized in that
Described thermal treatment unit has:
Radio-frequency induction coil, it can conducting high-frequency current, and along the axis direction of described lateral joint parts in the inside relative movement of described rail groove, while heat the inwall of described rail groove; And
Fuse, it is arranged on front end face and the aft end face in the relative movement direction of described radio-frequency induction coil, and the magnetic line of force conducting by described high-frequency current produced is directed to the inwall of described rail groove,
It is thinner than the described magnetic line of force of the motivating force transfer surface be directed in the inwall of described rail groove that described fuse makes the described magnetic line of force of the end face be directed in the inwall of described rail groove, wherein, motivating force from described lateral joint parts is delivered to described trivet parts by the contact with described roller by described motivating force transfer surface, and described end face is between mutually opposing described motivating force transfer surface.
In the thermal treatment unit of these lateral joint parts, utilize the front end face in relative movement direction and the fuse of aft end face that are arranged on radio-frequency induction coil, cut off towards the magnetic line of force beyond the motivating force transfer surface of rail groove and end face.That is, magnetic line of force is directed to motivating force transfer surface and the end face of rail groove.Now, by making the density of the magnetic line of force being directed to motivating force transfer surface and end face, i.e. magneticstrength different from each other, and the magneticstrength that the magneticstrength acting on motivating force transfer surface is compared to for end face is large.In this condition, such as, by making radio-frequency induction coil along the axis direction relative movement of rail groove, the hardened layer of size (degree of depth) different from each other can be formed to end face and motivating force transfer surface.That is, by thermal treatment once, the hardened layer of suitable size can just be formed respectively efficiently to end face and motivating force transfer surface.
Consequently, case depth can be avoided to become superfluous relative to the thickness of the sidewall of summit portion, can prevent lateral joint parts from producing hardening crack and melting etc.Further, case depth can be avoided not enough relative to the thickness of the sidewall of motivating force transfer surface part, for the motivating force transfer surface that roller is pressed against, also fully can improve weather resistance.That is, easily and efficiently can implement thermal treatment, obtain the lateral joint parts of excellent quality.
In this thermal treatment unit, preferably, part or all of the side opposed with described end face of described fuse has been carried out otch, makes the distance between the end face opposed with described end face of described fuse and this end face larger than the distance between the end face opposed with described motivating force transfer surface of described fuse and this motivating force transfer surface.In this case, in the magneticstrength of the end face of the rail groove mode less than the magneticstrength of motivating force transfer surface, can distribute and guide magnetic line of force.Thereby, it is possible to make the case depth of end face be less than the case depth of motivating force transfer surface, that is, can to end face and motivating force transfer surface high precision and easily form the hardened layer of suitable size respectively.
Further, preferably, described fuse has been carried out otch, make relative to described radio-frequency induction coil the part opposed with described end face perpendicular to the width on the direction of this end face, the ratio shared by the width of described fuse is 70% ~ 85%.In this case, easily make the case depth of described end face become from this end face to more than 45% of the thickness of the periphery of described lateral joint parts and less than 50%, and make the case depth of described motivating force transfer surface become with from described end face to 50% of the thickness of the periphery of described lateral joint parts suitable size more than.
Further, by by above-mentioned adjustment case depth, end face and motivating force transfer surface case depth separately can be made to become more suitably size.That is, while effectively avoiding producing hardening crack and melting etc., the lateral joint parts of excellent in te pins of durability can be obtained.
According to another embodiment of the present invention, provide a kind of manufacture method of lateral joint parts, form continuous print hardened layer at the inwall of rail groove and obtain lateral joint parts, described rail groove is formed multiple on the inner peripheral surface of the lateral joint parts of homokinetic joint along axis direction, and when trivet members slides is accommodated in described lateral joint parts freely, the roller rolls be installed on described trivet parts is inserted in described rail groove freely, it is characterized in that
Described manufacture method has such heat treatment step: the radio-frequency induction coil of conducting high-frequency current can be inserted into the inside of described rail groove, and while make described radio-frequency induction coil move relative to the relative position of described rail groove, while heat the inwall of described rail groove
In described heat treatment step, the front end face in the relative movement direction of described radio-frequency induction coil and aft end face arrange fuse, and the magnetic line of force that the conducting by described high-frequency current produces by described fuse is directed to the inwall of described rail groove,
Thinner than the described magnetic line of force of the motivating force transfer surface be directed in the inwall of described rail groove by making the described magnetic line of force of the end face be directed in the inwall of described rail groove, and make the case depth of described end face less than the case depth of described motivating force transfer surface, wherein, motivating force from described trivet parts is delivered to described lateral joint parts by the contact with described roller by described motivating force transfer surface, and described end face is between mutually opposing described motivating force transfer surface.
By through such process, as mentioned above, can easily obtain having carried out heat treated lateral joint parts with end face and the suitable mode of motivating force transfer surface case depth separately.
In the manufacture method of these lateral joint parts, preferably, at the front end face of described radio-frequency induction coil and aft end face, described fuse is set, part or all of the side opposed with described end face of described fuse has been carried out otch, makes the distance between the end face opposed with described end face of described fuse and this end face larger than the distance between the end face opposed with described motivating force transfer surface of described fuse and this motivating force transfer surface.In this case, having carried out the fuse of otch as described above by arranging, easily can form the hardened layer of suitable size at end face and motivating force transfer surface respectively, the lateral joint parts of excellent quality can be obtained efficiently.
Further, preferably, otch is carried out to described fuse, make relative to described radio-frequency induction coil the part opposed with described end face perpendicular to the width on the direction of this end face, the ratio shared by the width of described fuse is 70% ~ 85%.In this case, easily make the case depth of described end face become from this end face to more than 45% of the thickness of the periphery of described lateral joint parts and less than 50%, and make the case depth of described motivating force transfer surface become with from described end face to 50% of the thickness of the periphery of described lateral joint parts suitable size more than.
Further, by heat-treating in the mode reaching above-mentioned case depth, while effectively avoiding producing hardening crack and melting etc., the lateral joint parts of excellent in te pins of durability can be obtained efficiently.
Above-mentioned object, feature and advantage are easy understand from the explanation with reference to the following embodiment illustrated by accompanying drawing.
Accompanying drawing explanation
Fig. 1 illustrates that the coil assembly comprised in the thermal treatment unit of the lateral joint parts of present embodiment is inserted into the important part approximate three-dimensional map of the state in lateral joint parts.
Fig. 2 is that the II-II alignment of Fig. 1 looks sectional view.
Fig. 3 is the front enlarged view utilizing the coil assembly (thermal treatment unit) of Fig. 1 to define the open side of the lateral joint parts of hardened layer.
When (A) of Fig. 4 is 100% for fuse width/coil width, Fig. 4 (B) when being 85% for fuse width/coil width, Fig. 4 (C) be when being 0% for fuse width/coil width, respective magnetic line of force is shown and outlines figure to the relation between the magneticstrength of the inwall of rail groove.
Fig. 5 illustrates the graphic representation of fuse width relative to the relation between the ratio (fuse width/coil width) shared by radio-frequency induction coil width and case depth.
Fig. 6 is the important part outline exploded perspective view of homokinetic joint.
Fig. 7 is the important part sectional view along the direction vertical with the axis direction of the homokinetic joint shown in Fig. 6.
Embodiment
Below, enumerate preferred embodiment for the thermal treatment unit (hereinafter also referred to as thermal treatment unit) of lateral joint parts of the present invention and the manufacture method of lateral joint parts, be described in detail with reference to accompanying drawing.In addition, enclose identical reference label to the textural element identical with the textural element shown in Fig. 6 with Fig. 7, the description thereof will be omitted.
First, with reference to Fig. 1 ~ Fig. 3, the thermal treatment unit of present embodiment is described.Fig. 1 illustrates that the coil assembly 38 comprised in thermal treatment unit is inserted into the important part approximate three-dimensional map of the state in lateral joint parts 14.Fig. 2 is that the II-II alignment of Fig. 1 looks sectional view.Fig. 3 is the front enlarged view utilizing thermal treatment unit to define the open side of the lateral joint parts 14 of hardened layer 40.
The thermal treatment unit of present embodiment has coil assembly 38, and coil assembly 38 can be inserted into having in bottom outlet of the cupule 20 of lateral joint parts 14.Then, by making this coil assembly 38 relatively move along the axis direction of lateral joint parts 14, quenching is moved to the inwall of rail groove 22a ~ 22c.In addition, this thermal treatment unit except coil assembly 38, also have the high-frequency current that can export assigned frequency AC power and can to (all not shown) such as the cooling bodies that cools in the rail groove 22a ~ 22c after being heated by coil assembly 38.
Particularly, coil assembly 38 has radio-frequency induction coil 42 and fuse 44a ~ 44c.Radio-frequency induction coil 42 produces magnetic line of force by making the high-frequency current conducting of above-mentioned AC power output.And, radio-frequency induction coil 42 is made up of 3 heating part 46a ~ 46c and annulus 48, these 3 heating part 46a ~ 46c are formed as the shape of the inwall along rail groove 22a ~ 22c respectively, and this annulus 48 makes the heating part adjoined each other in the 46a ~ 46c of this heating part be connected to each other.That is, radio-frequency induction coil 42 is with heating part 46a ~ 46c diametrically from the mode that annulus 48 is outstanding, and one is formed with this heating part 46a ~ 46c and annulus 48 continuously.Further, heating part 46a ~ 46c in the mode consistent with the phase place of rail groove 22a ~ 22c, mutually with 120 ° separate at equal intervals.Front end face in the relative movement direction (axis direction) of this heating part 46a ~ 46c and aft end face are respectively arranged with fuse 44a ~ 44c.
The each side of heating part 46a ~ 46c is configured to mutually the same, and each side of this heating part 46a ~ 46c is similarly provided with fuse 44a ~ 44c.Therefore, below, for heating part 46a and the fuse 44a be arranged on the 46a of this heating part, its concrete structure is described, omits the explanation of heating part 46b, 46c and fuse 44b, 44c.
As shown in Figure 3, heating part 46a be two ends respectively with annulus 48 (with reference to Fig. 1) continuous print ring-type, have: along the bend 50,50 of the motivating force transfer surface 34,34 in the inwall of rail groove 22a; And along the line part 52 of end face 36 between this bend 50,50.
Further, fuse 44a is the plate-shaped member (with reference to Fig. 2) be such as made up of the contour magnetic permeable material of silicon steel sheet, and 1 core assembly 44a, 44a are configured to clamp the bend 50,50 of heating part 46a and a part for line part 52 from the both sides of axis direction.Thus, the magnetic line of force by producing to radio-frequency induction coil 42 conducting high-frequency current is directed to the inwall of rail groove 22a.
Further, on fuse 44a, by carrying out otch to the local, end of end face 36 side, and notch 54 is formed with.Therefore, when being inserted in rail groove 22a, the distance between end face 36 and the end face opposed with this end face 36 of fuse 44a is larger than the distance between motivating force transfer surface 34 and the end face opposed with this motivating force transfer surface 34 of fuse 44a.Thus, as described later, by making the interval of the magnetic line of force of the end face 36 be directed in the inwall of rail groove 22a dredge than the interval of the magnetic line of force of the motivating force transfer surface 34 be directed in the inwall of rail groove 22a, magneticstrength can be reduced.
Preferably, the kerf width of notch 54 is configured to, when the width L2 on the direction vertical with end face 36 of setting line part 52 as 100 time, the width L3 of the part covered by fuse 44a of this line part 52 is the ratio of 70 ~ 85.In other words, otch has been carried out in the end of end face 36 side of fuse 44a, make the width L3 of the part covered by fuse 44a of line part 52 relative to line part 52 width L2 shared by ratio (fuse width/coil width) be 70% ~ 85%.Thus, as described later, magnetic line of force can be directed to the inwall of rail groove 22a, make the case depth L4 of end face 36 be more than 45% of the thickness L1 of sidewall 36a and less than 50%, and the case depth L5 of motivating force transfer surface 34 is more than the size suitable with 50% of thickness L1.
The thermal treatment unit of present embodiment is formed by above substantially.Below, the manufacture method obtaining the lateral joint parts of lateral joint parts 14 by using the thermal treatment of this thermal treatment unit to form hardened layer 40 is described.
First, coil assembly 38 has been inserted in bottom outlet from the opening of the cupule 20 formed by forging processing etc., has configured heating part 46a ~ 46c respectively in the inside of rail groove 22a ~ 22c.From AC power to this radio-frequency induction coil 42 conducting high-frequency current.Thus, magnetic line of force is produced at heating part 46a ~ 46c.As described later, this magnetic line of force is guided by fuse 44a ~ 44c, makes it concentrate on the inwall of rail groove 22a ~ 22c.Consequently, produce induced current at the inwall of rail groove 22a ~ 22c, thus can heat-treat this inwall.
Like this, while heat-treating, coil assembly 38 is moved to bottom from the open side of cupule 20.Thus, after the thermal treatment of the inwall entirety of rail groove 22a ~ 22c completes, such as, utilize cooling body to spray water coolant, the inwall of rail groove 22a ~ 22c is cooled, thus hardened layer 40 can be formed.
For above-mentioned thermal treatment, for the situation utilizing heating part 46a and the inwall of fuse 44a to rail groove 22a to heat, be specifically described.In addition, for the inwall of rail groove 22b, 22c, heating part 46b, 46c and fuse 44b, 44c also can be utilized respectively similarly to heat-treat.
As mentioned above, in fuse 44a, by forming notch 54, fuse width/coil width is set as 70% ~ 85%.Thus, fuse 44a can distribute suitably respectively the motivating force transfer surface 34 of rail groove 22a and end face 36 and guide magnetic line of force.That is, magneticstrength can be adjusted to and make end face 36 and respective case depth L4, the L5 of motivating force transfer surface 34 be suitable size.
Here, preferably, the case depth L4 in end face 36 be the thickness L1 of sidewall 36a near this end face 36 more than 45% and less than 50%, on the other hand, preferably, the case depth L5 of motivating force transfer surface 34 is more than sizes suitable with 50% of the thickness L1 of sidewall 36a.In this case, case depth L4 can be avoided superfluous relative to the sidewall 36a near end face 36.Thus, when thermal treatment etc., while suppression lateral joint parts 14 produce hardening crack and melting etc., the hardened layer 40 that fully can improve the wear resistant of end face 36 can be formed.
And, for thickness compared with the sidewall 36a near end face 36 large, the case depth L5 of sidewall 34a near motivating force transfer surface 34, by being set as more than the size suitable with 50% of the thickness L1 of sidewall 36a, the weather resistance of lateral joint parts 14 fully can be improved.That is, for the motivating force transfer surface 34 that the roller 32 when transmitting rotary driving force at every turn is all pressed against, owing to being formed with the hardened layer 40 of abundant size, abrasion etc. can thus effectively be suppressed.
Such as, preferably, when the thickness L4 of sidewall 36a is 3.6mm, the case depth L4 of end face 36 is more than 1.3mm and less than 1.8mm.Further, preferably, the case depth L5 of motivating force transfer surface 34 is now more than 1.8mm.
Here, with reference to Fig. 4 and Fig. 5, fuse width/coil width when heat-treating the lateral joint parts 14 being 3.6mm at the thickness L1 of oppose side wall 36a is described with the relation of the magnetic line of force produced at heating part 46a and case depth L4, L5.In addition, in Figure 5, "●" represents the curve of end face 36, and " ▲ " represents the curve of motivating force transfer surface 34.
First, as shown in (A) in Fig. 4, when fuse width/coil width is 100% (when line part 52 is all covered by fuse 44a), the major part of the magnetic line of force beyond the motivating force transfer surface 34 and end face 36 of rail groove 22a is covered by fuse 44a.That is, the interval being directed into the magnetic line of force of motivating force transfer surface 34 and end face 36 becomes close, and magneticstrength becomes large.In this case, because the size of the magneticstrength to end face 36 is superfluous, thus as shown in Figure 5, the case depth L4 of end face 36 is about 2.20mm, exceedes above-mentioned suitable size.
Then, as shown in (B) in Fig. 4, when fuse width/coil width is 85%, distributed suitably by fuse 44a by the magnetic line of force being directed to the motivating force transfer surface 34 of rail groove 22a and end face 36 respectively.Thus, as shown in Figure 5, the case depth L4 of end face 36 can be made to become about 1.78mm, and make the case depth L5 of motivating force transfer surface 34 become about 1.90mm.That is, end face 36 and respective case depth L4, the L5 of motivating force transfer surface 34 can be made all to become suitable size.
Then, as shown in (C) in Fig. 4, when fuse width/coil width is 0% (when all exposing when line part 52), magnetic line of force intensively can not be directed into motivating force transfer surface 34 and end face 36, correspondingly, the interval acting on the magnetic line of force of this motivating force transfer surface 34 and end face 36 becomes dredges, and magneticstrength reduces.Therefore, as shown in Figure 5, the case depth L5 of motivating force transfer surface 34 is about 1.55mm, less than above-mentioned suitable size (1.8mm).
That is, as shown in Figure 5, when fuse width/coil width is 70% ~ 85%, end face 36 and respective case depth L4, the L5 of motivating force transfer surface 34 can be made all to become suitable size.
From finding out above, to have with fuse width/coil width be 70% ~ 85%, mode is formed in the thermal treatment unit of the present embodiment of the fuse 44a of notch 54, by thermal treatment once, end face 36 and respective case depth L4, the L5 of motivating force transfer surface 34 just can be made all to become suitable size.Thereby, it is possible to while effectively avoiding producing hardening crack and melting etc. in thermal treatment, easily and efficiently obtain the lateral joint parts 14 of excellent in te pins of durability.
In addition, the present invention is not particularly limited in above-mentioned embodiment, can carry out various modification in the scope not departing from its aim.
Claims (8)
1. the thermal treatment unit of lateral joint parts (14), its inwall to rail groove (22a ~ 22c) forms continuous print hardened layer (40), described rail groove (22a ~ 22c) is formed multiple on the inner peripheral surface of the lateral joint parts (14) of homokinetic joint (10) along axis direction, and when trivet parts (18) are accommodated in described lateral joint parts (14) sliding freely, the roller (32) be installed on described trivet parts (18) rolls and is inserted in described rail groove (22a ~ 22c) freely, it is characterized in that,
Described thermal treatment unit has:
Radio-frequency induction coil (42), it can conducting high-frequency current, and while along the axis direction of described lateral joint parts (14) in the inside relative movement of described rail groove (22a ~ 22c), heat the inwall of described rail groove (22a ~ 22c); And
Fuse (44a ~ 44c), it is arranged on front end face and the aft end face in the relative movement direction of described radio-frequency induction coil (42), magnetic line of force conducting by described high-frequency current produced is directed to the inwall of described rail groove (22a ~ 22c)
The described magnetic line of force that described fuse (44a ~ 44c) makes the described magnetic line of force ratio being directed to the end face (36) in the inwall of described rail groove (22a ~ 22c) be directed to the motivating force transfer surface (34) in the inwall of described rail groove (22a ~ 22c) is dredged, wherein, motivating force from described lateral joint parts (14) is delivered to described trivet parts (18) by the contact with described roller (32) by described motivating force transfer surface (34), described end face (36) is positioned between mutually opposing described motivating force transfer surface (34).
2. the thermal treatment unit of lateral joint parts (14) according to claim 1, is characterized in that,
Part or all of the side opposed with described end face (36) of described fuse (44a ~ 44c) has been carried out otch, makes the distance between the end face opposed with described end face (36) of described fuse (44a ~ 44c) and this end face (36) larger than the distance between the end face opposed with described motivating force transfer surface (34) of described fuse (44a ~ 44c) and this motivating force transfer surface (34).
3. the thermal treatment unit of lateral joint parts (14) according to claim 2, is characterized in that,
Described fuse (44a ~ 44c) has been carried out otch, make relative to described radio-frequency induction coil (42) the part opposed with described end face (36) perpendicular to the width on the direction of this end face (36), the ratio shared by width of described fuse (44a ~ 44c) is 70% ~ 85%.
4. the thermal treatment unit of lateral joint parts (14) according to claim 1, is characterized in that,
Described fuse (44a ~ 44c) guides described magnetic line of force, make the case depth of described end face (36) be from this end face (36) to more than 45% of the thickness of the periphery of described lateral joint parts (14) and less than 50%, and the case depth of described motivating force transfer surface (34) be with from described end face (36) to 50% of the thickness of the periphery of described lateral joint parts (14) suitable size more than.
5. the manufacture method of lateral joint parts (14), form continuous print hardened layer (40) at the inwall of rail groove (22a ~ 22c) and obtain lateral joint parts (14), described rail groove (22a ~ 22c) is formed multiple on the inner peripheral surface of the lateral joint parts (14) of homokinetic joint (10) along axis direction, and when trivet parts (18) are accommodated in described lateral joint parts (14) sliding freely, the roller (32) be installed on described trivet parts (18) rolls and is inserted in described rail groove (22a ~ 22c) freely, it is characterized in that,
Described manufacture method has such heat treatment step: the radio-frequency induction coil (42) of conducting high-frequency current can be inserted into the inside of described rail groove (22a ~ 22c), and while make described radio-frequency induction coil (42) move relative to the relative position of described rail groove (22a ~ 22c), while heat the inwall of described rail groove (22a ~ 22c)
In described heat treatment step, front end face in the relative movement direction of described radio-frequency induction coil (42) and aft end face arrange fuse (44a ~ 44c), the magnetic line of force that conducting by described high-frequency current produces by described fuse (44a ~ 44c) is directed to the inwall of described rail groove (22a ~ 22c)
Dredged by the described magnetic line of force making the described magnetic line of force ratio being directed to the end face (36) in the inwall of described rail groove (22a ~ 22c) be directed to the motivating force transfer surface (34) in the inwall of described rail groove (22a ~ 22c), and make the case depth of described end face (36) less than the case depth of described motivating force transfer surface (34), wherein, motivating force from described trivet parts (18) is delivered to described lateral joint parts (14) by the contact with described roller (32) by described motivating force transfer surface (34), described end face (36) is positioned between mutually opposing described motivating force transfer surface (34).
6. the manufacture method of lateral joint parts (14) according to claim 5, is characterized in that,
At the front end face of described radio-frequency induction coil (42) and aft end face, described fuse (44a ~ 44c) is set, part or all of the side opposed with described end face (36) of described fuse (44a ~ 44c) has been carried out otch, makes the distance between the end face opposed with described end face (36) of described fuse (44a ~ 44c) and this end face (36) larger than the distance between the end face opposed with described motivating force transfer surface (34) of described fuse (44a ~ 44c) and this motivating force transfer surface (34).
7. the manufacture method of lateral joint parts (14) according to claim 6, is characterized in that,
Otch is carried out to described fuse (44a ~ 44c), make relative to described radio-frequency induction coil (42) the part opposed with described end face (36) perpendicular to the width on the direction of this end face (36), the ratio shared by width of described fuse (44a ~ 44c) is 70% ~ 85%.
8. the manufacture method of lateral joint parts (14) according to claim 5, is characterized in that,
The case depth of described end face (36) is become from this end face (36) to more than 45% of the thickness of the periphery of described lateral joint parts (14) and less than 50%, and make the case depth of described motivating force transfer surface (34) become with from described end face (36) to 50% of the thickness of the periphery of described lateral joint parts (14) suitable size more than.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-210036 | 2013-10-07 | ||
| JP2013210036A JP5857020B2 (en) | 2013-10-07 | 2013-10-07 | Heat treatment apparatus for outer joint member and method for manufacturing outer joint member |
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| Publication Number | Publication Date |
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| CN104513883A true CN104513883A (en) | 2015-04-15 |
| CN104513883B CN104513883B (en) | 2017-01-11 |
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| CN201410521137.1A Active CN104513883B (en) | 2013-10-07 | 2014-09-30 | Thermal treatment device for external connector part and manufacture method for external connector part |
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| CN (1) | CN104513883B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240354A (en) * | 2019-07-19 | 2021-01-19 | 上海纳铁福传动系统有限公司 | High-strength compact type three-pivot universal joint |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101836610B1 (en) | 2016-04-04 | 2018-04-20 | 현대자동차주식회사 | Tripod joint spider and method of produce thereof and alloy steel applied thereto |
| FR3104171B1 (en) * | 2019-12-05 | 2023-02-24 | Neturen Co Ltd | Heating coil and quenching device |
| JP7309677B2 (en) * | 2019-12-05 | 2023-07-18 | 高周波熱錬株式会社 | Heating coil and hardening device |
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| JP2008075109A (en) * | 2006-09-20 | 2008-04-03 | High Frequency Heattreat Co Ltd | Supporting tool for tempering-heating cylindrical member having variation of wall thickness |
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| JPS56139622A (en) * | 1980-03-31 | 1981-10-31 | Denki Kogyo Kk | Heat treatment method of threaded part by high-frequency induction heating and its device |
| CN1042945A (en) * | 1988-11-26 | 1990-06-13 | A·E·毕晓普及合夥人有限公司 | The improvement of scanning induction quenching technology |
| CN1134985A (en) * | 1995-08-04 | 1996-11-06 | 铁道部宝鸡桥梁工厂 | Method and equipment for quenching switch blade from 5 mm part of railway |
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| CN112240354A (en) * | 2019-07-19 | 2021-01-19 | 上海纳铁福传动系统有限公司 | High-strength compact type three-pivot universal joint |
| CN112240354B (en) * | 2019-07-19 | 2021-12-07 | 上海纳铁福传动系统有限公司 | High-strength compact type three-pivot universal joint |
Also Published As
| Publication number | Publication date |
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| JP2015074791A (en) | 2015-04-20 |
| CN104513883B (en) | 2017-01-11 |
| JP5857020B2 (en) | 2016-02-10 |
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